Nut-lock.



GIL. SMITH, H. F. GRAVER & J. J. WIEGAND. I NUT LOCK.

APPLIGATICN FILED MAR. 11, 19097 940,990. Patented Nov. 23, 1,909.

v 8 h (l. 95. e ll UNITED gun e -em OFFICE.

GEORGE L. SMITH, HENRY F. GRAYER. AND JOHN J'. WIEGAND, OF EAST TOLEDO, OHIO.

NUT-LOCK.

' Stateof' Ohio, have invented certain new and useful Improvements in Nut-Locks, of

which the following is a specification, reference-being had therein to the accompanying drawing. v I This UtYElltlOll relates to nut. and bolt iockrgand the principal object of the same is to provide a device of the character stated in which the nut ispositively held from ro- 1 tating to an unlocked, or bolt releasing, po-

sition by means of anovel type of. asher, the washer in turn being held from rotary movement by means of a direct engagementwith the work or article with which the bolt is engaged. c H

-Witzl the above and many other ob ects in view, the invention conteniplatesia de rice of the character stated which is composed of few parts and which may be cheaply and economically produced, and which will eliiciently perform the functions for which they are designed.

In carrying out the objects of the in-' volition it will of course be readily under stood that the essential features thereof are susceptible of. changes in detailsand structural arrangements,- but one preferred and practical embodiment thereof is shown in the accompanying drawings, wl1erein-.-,

Figure l is af-sectional view a-piece of work shown-1g the improved t lo'clrtieppliedthereto. Fig. 2 is a perspectiveview of thenut engaging washer-tshowing. the

worksengagingspur or lug-{carried thereby. Fig. 31s a similarview of the washer, taken from the opposite siderto that shown'in Fig.

2. Fig. i is a perspectiveiview of the nut used in connection with the-present invention. Fig. 5 is a plan view of the washer as shown in Fig. 2. v v

Referring to the accompanying drawings numerals, 1 designates the work with which the bolt engages, said boltabeing preferably, but not' necessarily, prdvided'with; an exteriorily rounded head 2 and an enlarged neck 3, the body 4 of the bolt'being provided with the threaded end portion 5.

The nut used in connection with the present invention may havethe general. contour as shown, or may be of any convenient or usual .type so far as its outer face 1S,CQI1-- Specification of Letters Patent. Application filed March 11, 1909. Serial No. 482341.

,' grevenbrotation of the"nut"in a loosening" Patented Nov. 23, 1909.

5 eerned, but its inner face is provided with i a ratchet surface, as best shown in Fig. 4 .ofthe z iccoinpanying drawings. The ratchet surface of the nut is formed by providing the rearface of the nut with a plurality of inclined planes 6, thelower ends of which terminate in abrupt shoulders 7,. said shoulders r-rdiatiii ggfffo iifliliejEcentefiof the nut.

asher which cooperates with the describednut is of a flat, split ring type, design a'ted in its entirety by the numeral 9, has an outstanding, pointed, spur or lug 9 projecting from one side, said spur or lug heii'ig preferably located at the outer end of thev split portion 10. The other end of the washer is reduced in thickness, as indicated at 11 andis deflected in a direction'opposite to the direction in which the spur or lug 9. projects, to form a dog or pa wl12 which cooperates with the ratchet of the nut to hold the nut in a locked position on the bolt.

In assembling the improved nut lock, the bolt is forced through thework to be held in the usual manner, and the washer 9is'placed on the nut with its lug or spur 9? in engagement with the work, as shown in Fig. 1. The. nut. is then screwed onto the bolt until its ratchet. face is in binding engagement with the washer. WVhen in this position the pawl or dog 12 will abut against one 0L, the shoulders 7 and thereby preventthe nut being rotated to a bolt-releasing'position.-\

A's is shown more clearly in Fig. 1, the. reduced portion of the washer which forms the dog or pawl 12 has a shoulder 13 at its junction with the-body of the washer, which shoulder projects into the ath of ,movement of the shoulders 7 of t-e nut, so that in the event of the pawl "or dog becomin broken off, or buckled out of position, it "wi serve as a lock to prevent the not being forced past the same. 1 I a It will be understood, of'course, that as the do or pawlfiis reduced iii-thickness, it. will offer little -or no resistance tothe nut being rotated thereover when turning in a directionto tighten the nut, but as soon as an attempt is made to turn the nut to a loosening position, it will immediately s ring into engagement with the. straight side otthe abutment shoulder, and thereby" irection. s

It will be understood by refrenceto Fig. 1 that when the nut isti' htly jgr'nmed onto the washer 9 with one 0% itstetth' engaged hy (the spring pawl 12 theaengaged tooth willbe positionedlacross tle splitportion I 10 of the washer,,so that the s. ouldered portion 13 of said. washer will ha .little or no pressure exerted upon it by the nut, and, therefore, the said washer will buckle slightly at the shouldered portion 13 sufliciently to cause said shoulder to rise and engage with one of the shoulders 7 of the split Washer carried by the bolt, one end of the washer being reduced to provide a spring pawl and abrupt shoulder for engagement with the shouldered surface of said nut, and

a. penetrating spur carried by the other end of said Washer for engagement with the work.

2. Ina nut lock, the combination with a bolt, of a nut therefor. provided with ,a shouldered surface, and. asplit washer carried by the bolt one side of which has a reduced spring pawl and an abutment shoulder for engagementwith the shoulders of the nut and the other side of said split washer being provided with a penetrating spur for engagement with the Work. In testimony whereof we hereunto aifix presence of two witnesses.

GEORGE L. SMITH. HENRY F. GRAVER. JOHN J. XVIEGAND.

our signatures in \Vitnesses:

Bnssus DowELL,

P. I. DOLAN. 

